Problem while converting datatime to timestamp

Hello,
I am writing a simple jdbc program, which will print data column in my table. I use this statement users.getString('update_time') The field in my database contains, for e.g, this value 2010-01-12 20:54:35.0.
The program prints this value, but also throws exception as Cannot convert value '0000-00-00 00:00:00' from column 7 to TIMESTAMP.